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Novel wavelet neural network algorithm for continuous and noninvasive dynamic estimation of blood pressure from photoplethysmography

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Abstract

This paper proposes a novel wavelet neural network algorithm for the continuous and noninvasive dynamic estimation of blood pressure (BP). Unlike prior algorithms, the proposed algorithm capitalizes on the correlation between photoplethysmography (PPG) and BP. Complete BP waveforms are reconstructed based on PPG signals to extract systolic blood pressure (SBP) and diastolic blood pressure (DBP). To improve the robustness, Daubechies wavelet is implemented as the hidden layer node function for the neural network. An optimized neural network structure is proposed to reduce the computational complexity. Further, this paper investigates an inhomogeneous resilient backpropagation (IRBP) algorithm to calculate the weight of hidden layer nodes. The IRBP improves the convergence speed and reconstruction accuracy. Multiparameter intelligent monitoring in Intensive Care (MIMIC) databases, which contain a variety of physiological parameters captured from patient monitors, are used to validate this algorithm. The standard deviation σ between reconstructed and actual BP signals is 4.4797 mmHg, which satisfies the American National Standards of the Association for the Advancement of Medical Instrumentation. The reconstructed BP waveform can be used to extract the SBP and DBP, whose standard deviations σ are 2.91 mmHg and 2.41 mmHg respectively.

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Authors and Affiliations

  1. State Key Laboratory on Integrated Optoelectronic, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China

    Peng Li, Ming Liu, Xu Zhang, Xiaohui Hu, Bo Pang, Zhaolin Yao & Hongda Chen

Authors
  1. Peng Li
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  2. Ming Liu
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  3. Xu Zhang
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  4. Xiaohui Hu
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  5. Bo Pang
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  6. Zhaolin Yao
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  7. Hongda Chen
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Corresponding authors

Correspondence to Ming Liu or Xu Zhang.

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Li, P., Liu, M., Zhang, X. et al. Novel wavelet neural network algorithm for continuous and noninvasive dynamic estimation of blood pressure from photoplethysmography. Sci. China Inf. Sci. 59, 042405 (2016). https://doi.org/10.1007/s11432-015-5400-0

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  • DOI: https://doi.org/10.1007/s11432-015-5400-0

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